Sure thing then, I'll attempt to answer your question.
So what is : " Muslim is in the plan of salvation because adore abraham god mean?"
I don't think what you've got in quotes is actually a quote from that document.
But I think what the writers of lumen gentium are getting at is the idea that some Muslims will be saved, especially those who have never heard the name of Jesus, or who have never heard a truthful description of Jesus.
and that's why I was asking you about what happens to people who have never heard about Jesus.
If I remember right, in the end you said you didn't know. So, it follows that Catholics may be correct that some Muslims who have never heard accurately about Jesus have the possibility of heaven, and as such are included in the plan of salvation.